Table 1 Soil plots sampled in this study.

From: Composition and activity of nitrifier communities in soil are unresponsive to elevated temperature and CO2, but strongly affected by drought

 

Treatments used for statistical analyses

Treatment

Description

Individual and combined effects of temperature and CO2

Individual and combined effects of future climate and drought

[Amb]

Ambient conditions (n = 8)

×

×

[eT]

+3 °C above ambient (n = 3)

×

 

[eCO2]

+300 ppm CO2 above ambient (n = 3)

×

 

[eT] × [eCO2]

+3 °C and +300 ppm CO2 above ambient (n = 4)

×

×

[Amb] × [D]

Ambient conditions + rainout shelter (n = 4)

 

×

[eTeCO2] × [D]

+3 °C and +300 ppm CO2 above ambient + rainout shelter (n = 4)

 

×

  1. Biological replicates are shown in parenthesis. Specific soil plots were selected in order to test for either the individual and combined effects of elevated temperature and CO2 or the individual and combined effects of future climate and drought. This separation was done in order to have a full factorial design for each set. The spatial arrangement of all the plots is shown in Fig. S1.
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